¼ inch hex drive impact drivers do not use a chuck system, which means that the bits for the drill fit directly into the machine. These bits are shaped in a hex pattern and simply clip into the drill. These drill drivers are commonly used for screwing and socket work, and can accept hex screw bits and socket bits. These drills can also be used for drilling, however hex shaped drill bits are required to fit in these drill drivers. Standard round drill bits will not fit.
- The key consideration when choosing a drill driver is the maximum drilling diameter required. Drill drivers with 1/4' hex drives; the drill bit fits straight into the machine rather than tightened into a chuck. This drill can only be fitted with 1/4' hex shank.
- Choosing the right battery: Cordless (or battery powered) tools have a variety of chemical battery types; Li-ion is the latest technology, prior to that it was Ni-MH and Ni-Cad was the original. The higher the Ah (Ampere hours) the longer the interval between charges; the fewer times you recharge a battery the longer it will last. Some cordless tools can also come without batteries - sometimes referred to as naked, bare units or body only. These tools are supplied without a battery or charger and more often than not without any accessories; as a result they are significantly cheaper in price.
- Most professional drill drivers have a variable speed function and a variety of torque settings. Additionally there is often a choice between single, 2 or 3 speed gears; a low speed and higher torque setting is used for screw driving whilst a higher speed is used for drilling metal or wood for example. Combi drills and impact drivers have higher torque settings.
- To also help you decide between drill driver - 1/4" hex drive